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Temperature field numerical simulation ofinduction skull melting processCHEN Zi-yong(陈子勇), SHU Qun(舒 群), XU Li-juan(徐丽娟),TIAN Jing(田 竞), CHEN Yu-yong(陈玉勇)(School of Materials Science and Engineering,Harbin Institute of Technology, Harbin 150001, China)Abstract:A mathematical model for temperature field of water-cooling copper crucible in the induction skull melting process is established......
the measuring points was illustrated. The effect of infiltration process parameters on the infiltration front was analyzed. It is found that pressure and pouring temperature are the most important... of velocity reached its maximum when the pressure was 0.4 MPa and the pouring temperature was 800 ℃. With the increase of pressure and the decrease of temperature, the fluctuation of velocity became smaller......
Temperature field simulation of gob influenced by atmospheric pressureWANG Gang(王刚)1,2, LUO Hai-zhu(罗海珠)2, LIANG Yun-tao(梁运涛)2, WANG Ji-ren(王继仁)1(1. College of Safety Science and Technology, Liaoning...)Abstract:The current temperature field model of mine gob does not take the boundary conditions of the atmospheric pressureinto account, while the actual atmospheric pressure is influenced by weather, so......
Size effect of sandstone after high temperature under uniaxial compressionSU Hai-jian(苏海健)1, JING Hong-wen(靖洪文)1, MAO Xian-biao(茅献彪)1, ZHAO Hong-hui(赵洪辉)1, YIN Qian(尹乾)1, WANG Chen(王辰)2(1. State Key... of Mining & Technology, Beijing 100083, China)Abstract:Uniaxial compression tests on sandstone samples with five different sizes after high temperature processes were performed in order to investigate......
Temperature gradients in concrete box girder bridge under effect of cold waveGU Bin(顾斌)1, CHEN Zhi-jian(陈志坚)2, CHEN Xin-di(陈欣迪)3(1. College of Civil and Transportation Engineering, Hohai University..., China)Abstract:The temperature distributions of a prestressed concrete box girder bridge under the effect of cold wave processes were analyzed. The distributions were found different from those under......
Microstructure Development of Directionally Solidified Nb-Ti-Si Based Ultrahigh Temperature Alloy () 摘要:Integrally directional solidification of an Nb-Ti-Si based ultrahigh temperature alloy was performed in an ultrahigh temperature and high thermal gradient furnace with the use of ceramic crucibles. The microstructural evolution with the withdrawing rate increasing during directional......
pouring temperature and rotating speed of duct can significantly improve effective nucleation rate, decreasing the cooling intensity of the melt metal can give rise to a transition of the growth morphology...组织 Fig.1 Microstructures of alloys under rotating rate of 232r/min, pre-heating temperature of 470℃ and different pouring temperatures 图2 浇注温度为640℃, 预热温度为30℃的石墨坩埚在不同输送管转速下的合金微观组织......
Research on Mediate Temperature Decomposition of High Nitrogen Austenite HU Ming-juan1,LI Xiao-ling1,BEI Duo-hui1,ZHU Zu-chang1 (1.School of Material Science and Engineering, Shanghai Jiao Tong... are composed of highly dispersed α-Fe and γ-Fe4N, with both of them maintaining nanometer scale. The micro-hardness of them can be as high as900HV. 关键词:high nitrogen austenite; mediate temperature......
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